Rothera 12Z 500hPa temperature 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - - - - - - - - - - - 2002 - - - -29.6 -34.1 - - - - - - - 2003 - - - -27.8 -35.7 -35.6 -36.3 -35.7 -35.0 -31.8 -35.0 -31.4 2004 -29.9 -29.1 -29.5 -32.4 -31.4 -32.9 -36.1 -38.0 -36.3 -32.6 -33.8 -29.8 2005 -28.6 -28.8 -30.5 -31.0 -31.3 -34.2 -33.5 - -33.1 - -31.4 -31.8 2006 -28.9 -27.3 -30.8 -32.6 -36.7 -33.6 -34.7 -34.4 -34.6 -33.6 -32.3 -31.3 2007 -25.9 -29.0 -29.5 -32.8 - - - - -35.7 -37.2 -33.1 -29.9 2008 -28.9 -29.4 -29.8 -33.3 -34.5 -33.0 -35.3 -35.2 -33.1 -32.8 -32.5 -32.1 2009 -30.7 -30.6 -30.3 -32.4 -33.5 -35.0 -34.9 -36.2 -36.7 -37.4 -33.6 -31.8 2010 -30.4 -26.5 -29.9 -32.6 -32.4 -36.1 -35.3 -35.6 -34.3 -33.8 -33.8 -30.9 2011 -30.7 -30.6 -29.6 -33.5 -34.1 -36.1 -34.5 -34.3 -35.3 -33.3 -32.0 -30.2 2012 -29.3 -31.2 -27.7 -31.2 -32.0 -35.7 -35.5 -36.4 -33.6 -34.8 -33.2 -29.1 2013 -27.9 -30.7 -28.4 -30.7 -32.9 -37.2 -36.3 -37.8 -37.2 -33.2 -35.9 -32.7 2014 -29.5 -29.3 -31.5 -28.9 -29.2 -33.4 -35.3 -34.0 -33.8 -33.2 -33.9 -31.4 2015 -28.2 -28.1 -29.1 -31.7 -30.8 -37.3 -38.4 -37.4 -36.0 -34.3 -32.2 -29.9 2016 -27.9 -27.8 -29.3 -32.8 -27.8 -32.7 -34.9 -36.7 -35.1 -31.4 -31.2 -32.3 2017 -30.4 -28.3 -25.7 -28.9 -33.2 -35.8 -36.9 -34.5 -39.4 -34.0 -31.5 -30.3 2018 -30.0 -27.8 - -33.7 -34.9 -34.5 -33.8 -36.1 -37.1 -31.6 -34.5 -31.1 2019 -28.0 -26.3 -30.5 -31.6 -32.6 -32.8 -32.9 -33.4 -33.4 -34.6 -30.2 -29.5 2020 -27.1 -24.2 -31.1 -31.7 -30.4 -33.6 -33.8 -38.5 -34.4 -33.2 -33.6 -30.8 2021 -29.5 -26.9 -30.0 -31.5 -32.4 -32.9 -34.5 -37.2 -36.4 -34.9 -33.1 -31.5 2022 -28.4 -28.1 -30.2 -31.3 -30.5 -34.4 -35.1 -35.2 -35.2 -36.0 -33.2 -29.9 2023 -29.5 -29.0 -31.6 -33.1 -33.1 -34.3 -34.6 -37.3 -32.3 -34.3 -33.1 -29.9 2024 -31.0 -28.3 -28.6 -30.9 - - - - - - - -